A bulletin board is an online discussion site. It's sometimes also called a 'board' or 'forums'. It may contain several categories, consisting of forums, threads and individual posts.
In most nightclub environments, dark wool, cotton or synthetic slacks mate well with a button up shirt. Gentlemen in nightclubs should use caution to distinguish between button-up shirts appropriate for nightclub wear and the dressier, somewhat stodgier button-up shirts intended for professional office wear.
The bar or bat mitzvah dress code depends on the synagogue, and should be spelled out in the invitation. Men are typically expected to wear a suit or slacks and a tie. Women should wear a modest dress or formal pantsuit.